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Full text of "Handbook Of Chemical Engineering - I"

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292
CHEMICAL ENGINEERING
plates make an excellent type for this kind of work as if anything goes wrong with the valves the removal of two or three stud bolts enables one to remove the valve
8
FIG. 15.—Portland filter, air side.
FIG. 16.—Portland filter, drive side.
plate and put in fresh springs the cost of which is trifling, the operation requiring no entrv into thfl  hndv nf t.h